CVE-2026-68216

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

media: pwc: Return queued buffers on start_streaming() failure

The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak.

pwc's start_streaming() had two early returns that hit this trap: -ENODEV when the USB device was already disconnected, and -ERESTARTSYS when mutex_lock_interruptible() was interrupted by a signal. Call the existing pwc_cleanup_queued_bufs() helper with VB2_BUF_STATE_QUEUED before returning (matching the state already used by the pwc_isoc_init() error path in the same function).

This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

media: pwc: Return queued buffers on start_streaming() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f2f9fcacd81953dde6cb86312ab13ca13e689664
generic

media: pwc: Return queued buffers on start_streaming() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cb16b79a2be2cec9c3ebe4147490817c4d8b1de3
generic

media: pwc: Return queued buffers on start_streaming() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a4f8f629983f643333e49df90557805469bcbb25
generic

media: pwc: Return queued buffers on start_streaming() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/975b2ee20e569d47821e4f6c9761b4664d48a6a4
generic

media: pwc: Return queued buffers on start_streaming() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d7cc2634c3843a1414a0f6407aa17f1f91dee60

Vendor Advisories for CVE-2026-68216(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 33× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 19:12 UTCGHSA enrichment
  3. 2026-08-20 06:19 UTCGHSA enrichment
  4. 2026-08-19 17:25 UTCEG score recompute
  5. 2026-08-19 17:25 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 16:55 UTCEG score recompute
  8. 2026-08-19 16:55 UTCGHSA enrichment
  9. 2026-08-19 10:42 UTCGHSA enrichment
  10. 2026-08-18 21:40 UTCEG score recompute
  11. 2026-08-18 21:40 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 08:23 UTCGHSA enrichment
  15. 2026-08-17 19:20 UTCEG score recompute
  16. 2026-08-17 19:20 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 05:38 UTCEG score recompute
  19. 2026-08-17 05:38 UTCGHSA enrichment
  20. 2026-08-17 05:09 UTCEG score recompute
  21. 2026-08-17 05:09 UTCGHSA enrichment
  22. 2026-08-17 04:53 UTCGHSA enrichment
  23. 2026-08-16 15:59 UTCEG score recompute
  24. 2026-08-16 15:59 UTCGHSA enrichment
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 20 more
  1. 2026-08-16 03:05 UTCEG score recompute
  2. 2026-08-16 03:05 UTCGHSA enrichment
  3. 2026-08-15 14:11 UTCEG score recompute
  4. 2026-08-15 14:11 UTCGHSA enrichment
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-15 01:17 UTCGHSA enrichment
  7. 2026-08-14 12:23 UTCEG score recompute
  8. 2026-08-14 12:23 UTCGHSA enrichment
  9. 2026-08-13 23:29 UTCEG score recompute
  10. 2026-08-13 23:29 UTCGHSA enrichment
  11. 2026-08-13 22:44 UTCEG score recompute▲ 7.80
  12. 2026-08-13 22:44 UTCGHSA enrichment
  13. 2026-08-13 22:44 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 15:36 UTCEG score recompute
  16. 2026-08-13 15:36 UTCGHSA enrichment
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-10 13:24 UTCNVD update
  19. 2026-08-10 12:20 UTCEG score recompute
  20. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68216?
CVE-2026-68216 is a high vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: media: pwc: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling startstreaming(). If startstreaming() returns an error without first returning those…
When was CVE-2026-68216 disclosed?
CVE-2026-68216 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68216 actively exploited?
CVE-2026-68216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 92.6% of all scored CVEs.
What is the CVSS score of CVE-2026-68216?
CVE-2026-68216 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-68216?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68216, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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